There are two kinds of fertilizer damage. The most common one is caused by chemical fertilizers. The amount of fertilizers is large and concentrated. It is easy to cause root burns. Symptoms are trunk dryness or whole plant death; the second is to use large amounts of organic fertilizer that has not been cooked to cause burning of roots. , causing the aboveground to weaken or even die.
Preventive measures: For the slight burning of roots caused by fertilization, you can first turn the tree tray, mix fertilizer and soil, and then pour 1 or 2 times large water to dilute the fertilizer concentration. If the trunk is dried up, it must be coated or painted in time, covered with a plastic film to promote the formation of healing tissue and prevent the transformation into dry rot or rot. Fertilizers should be applied in more points, with a depth of 15 to 20 cm and a fertilizer of 0.25 to 0.5 kg per hole, or they can be sprinkled in a tree tray and turned around in the garden. Organic fertilizer must be decomposed or dried before applying it.
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